A multicentred phase III comparatiye study between single-implant containing 3-ketodesogestrel (Implanon®) and implants containing levonorgestrel (Norplant®) I. Effïcacy, acceptability and safety (three-year results) - Affandi, Biran; Klinik Raden Saleh, Department of Obstetrics and Gynecology Faculty of Medicine, Universitas Indonesia/Dr Cipto Mangunkusumo National Hospital, Jakarta. (Faculty of Medicine Universitas Indonesia, 1999)